According to the logistic growth model, what happens to a population when the size of the population reaches carrying capacity?
the growth rate is zero
An unexpected freeze that kills a population of chipmunks is an example of ______.
a density-independent factor
If a population's growth rate decreases as the population size approaches carrying capacity, the population's growth follows a(n) ______ model.
logistic
In a population that is following a logistic growth pattern, what shape does the population's growth curve most closely resemble?
S
In an ideal, unlimited environment, a population's growth follows a(n) ______ model.
exponential
Non-native species can have important effects on biological communities by ______.
doing all of the above
Opportunistic species typically ______.
have a large number of offspring
Species that exhibit an equilibrial life history typically ______.
have long lives
The Endangered Species Act aims to help protect species that ______.
are in danger of extinction
The ecological footprint of the United States ______.
shows that Americans consume a disproportionate amount of food and fuel
Type I survivorship curves are typical of species that exhibit ______.
few offspring and good parental care
What is a population?
a group of organisms that occupy the same general area
Which of these best describes Type II survivorship?
survivorship is constant over the lifespan
Which of these best describes Type III survivorship?
survivorship is high for the few individuals that survive to a certain age
Which of these factors operates in a density-dependent manner?
food supply
Which of these is a characteristic of Type I survivorship?
most individuals survive to older age intervals
______ is the maximum population size that a particular habitat can support.
carrying capacity
